The Kahaluʻu Taro Loʻi Historic District, also known as the ʻĀhuimanu Taro Complex, in Kahaluʻu on the windward side of Oʻahu, is the most complex and largest intact system of terraces for growing wetland taro on Oʻahu. It contains at least 18 loʻi (pondfield) terraces once watered by ʻĀhuimanu Stream and associated ʻauwai (irrigation ditches) over about 25 acres (100,000 m2) that start from headwaters just below the cliffs of the Koʻolau Range. It was added to the National Register of Historic Places in 1973, after windward residents raised concerns about development plans in the area. The Kahaluu Fish Pond was also added to the National Register at that time.